Oogenesis comprises

After ovulation,what does the Graafian follicle transform into?

The Graafian follicle ruptures to release . . . . . . from the ovary by the process called ovulation.

What does a mature sperm contain?

Given below are two statements :
Statement-$I$ : Each primary oocyte gets surrounded by a layer of granulosa cells and is called a primary follicle.
Statement-$II$ : At puberty,only $60,000-80,000$ primary follicles are left in each ovary.
In the light of the above statements,choose the most appropriate answer from the options given below :

Sperm and ovum contain ........